Splintered Spain: Bitter divisions over Catalonia ahead of general election

It's a familiar drill for Spanish citizens. For the third time in four years, they're being asked to vote in a general election. And if you think four's a crowd, polls indicate the return next Sunday of the far-right after nearly four decades. The splintering of the political landscape began with the financial and real estate crisis a decade ago. How did we get from the left-wing Indignados anti-austerity movement to xenophobic right-wing nativism? How did moderate Spain become so entrenched?